ScienceWhich type of weather is most likely produced by a cold front? A. light to moderate precipitation B. moderate to heavy precipitation C. no precipitation** D. heavy precipitation and thunderstorms
Thursday, January 29, 2015 at 5:59pm

ScienceA geologist finds a layer of rock that is made of medium-grained sands and is porous. What type of rock did the geologist find? A. sandstone** B. conglomerate C. coquina D. limestone
Thursday, January 29, 2015 at 5:59pm

ScienceA geologist finds a layer of rock that is made of coarse-grained foliated particles arranged into bands and splits into sheets when struck with a hammer. What type of rock did the geologist find? A. quartzite B. gneiss** C. marble D. slate
Thursday, January 29, 2015 at 5:58pm

ScienceHow would a geologist identify an igneous rock as intrusive? A. An intrusive rock has coarse grains because it cooled more slowly on the surface of the earth. B. An intrusive rock has coarse grains because it cooled more slowly beneath the surface of the earth.** C. An ...
Thursday, January 29, 2015 at 5:57pm

ScienceHow do plants produce chemical weathering? A. They secrete carbon dioxide that combines with water on the rocks and dissolves the minerals in the rocks. B. They secrete chemicals that freeze the water within the cracks of the rocks and break down the rocks. C. They secrete ...
Thursday, January 29, 2015 at 5:56pm

ScienceWhich explains how climate data were used as evidence to develop the theory of continental drift? A. Similar glacial deposits and sediments were found on areas of the same continent that are now thousands of miles apart. B. Different glacial deposits and sediments were found ...
Thursday, January 29, 2015 at 5:56pm

ScienceEarthquakes occur on the earth today, so we can assume they occurred in the past. Which important geologic principle does this sentence support? A. original horizontality B. faunal succession C. superposition D. uniformitarianism**
Thursday, January 29, 2015 at 5:56pm

ScienceAccording to the theory of plate tectonics, how do two plates interact to form coastal volcanic ranges? A. A continental plate slides along an oceanic plate at a convergent boundary. B. A continental plate collides with another continental plate at a convergent boundary. C. An...
Thursday, January 29, 2015 at 5:55pm

ScienceA mineral breaks into flat sheets when struck with a rock hammer. Which property of a mineral is being measured? A. hardness B. cleavage** C. streak D. color
Thursday, January 29, 2015 at 5:55pm

ScienceWhich explains the greenhouse effect? A. Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space. B. Greenhouse gases like water vapor and carbon dioxide release heat in the atmosphere, thereby radiating ...
Thursday, January 29, 2015 at 5:54pm

ScienceWhich explains how plants can chemically weather a rock? A. Plant roots get into cracks and secrete water, which freezes and breaks apart the rocks. B. Plant roots get into cracks, grow, and break apart the rocks. C. Plant roots get into cracks and secrete acids, which freeze ...
Thursday, January 29, 2015 at 5:54pm

Science 1. Which of the following best summarizes the function of the respiratory system? A. to transport oxygen to cells and wastes away from cells. B. to protect the organs in the chest cavity C. to move oxygen from the air into the body and carbon dioxide from the body into the air...
Thursday, January 29, 2015 at 5:06pm

SciencePlease could someone check these for me. 1In a series of rock layers, a geologist finds fossils of a lizard-like dinosaur and a fern-like tree in layers that are 1.0 m and 1.5 m deep. However, in a layer that is 2.0 m deep, he finds fossils of bony fish and shellfish. Which ...
Thursday, January 29, 2015 at 3:52pm

7th grade scienceCan you help me with genetics questions? Directions: In each set, tell which word does not fit with the others. Then explain why you think it does not. You must mention all words. 1. Aa, Heterozygous, Hybrid, Homozygous Ans: Homozygous doesn't belong because letters are ...
Thursday, January 29, 2015 at 2:21pm

scienceIn the below the results are given for the saprate mating of tomato plant what are the most probable genotype for the parents in each instance? 1.purple, cut¡Ágreen cut- cut purple-321, potato purple-101, cut green-310, potato green-107 2.purple, cut¡&Aacute...
Thursday, January 29, 2015 at 11:19am

Earth Science15. Which statement best describes the composition of magma? A. Magma is an element all its own.B. Magma contains the same elements as snow.C. Magma contains only three elements.D. Magma contains the same ...
Wednesday, January 28, 2015 at 10:03pm

Earth Science Which statement best describes the composition of magma? A. Magma is an element all its own. B. Magma contains the same elements as snow. C. Magma contains only three elements. D. Magma contains the same elements as Earth's crust.&...
Wednesday, January 28, 2015 at 8:38pm

Earth Science 10. Which statement best describes the formation of diamonds? A. Diamonds form in kimberlites under very low pressure. B. Diamonds form in talc under very low pressure. C. Diamonds form in talc under very high pressure. D. ...
Wednesday, January 28, 2015 at 7:37pm

Earth Science A heterogeneous mixture is a A. mixture in which its components retain their identity. B. component added to sand that makes it inseparable. C. mixture that always contains water. D. mixture in which its components can't be separated.&...
Wednesday, January 28, 2015 at 5:53pm

Science1) Which of the following is a chemical change? (1 point) Boiling of water Melting a cube of ice Dissolving 10 grams of salt in water Splitting water into hydrogen and oxygen*** 2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 ...
Wednesday, January 28, 2015 at 2:22pm

ScienceI would really appreciate it if someone checked my answers and told me if they were right. Thx. ~Ashley 1. Which of the following determines the strength of the force of gravity between two objects? Check all that apply. A: The speeds of the objects. *B: The masses of the ...
Wednesday, January 28, 2015 at 2:21pm

ScienceHow do lawmaker make good environmental decisions? A. By relying on the short-term benefits of an environmental issue. B. By weighing down the costs and benefits of an environmental issue C. By relying only on the economical impact of an environmental issue D. By relying only ...
Wednesday, January 28, 2015 at 1:59pm

ScienceWhich kind of pollution is illustrated by a pipe gushing polluted water into a river? A. Point source B. Nonpoint source C. Carbon source. D. Resource source
Wednesday, January 28, 2015 at 1:51pm

sciencean animal that basks on a warm rack during the morning hours but retreats to the sade of the rocks during the middle day is most likely a(n) A)ectotherm B) endotherm C)vertebrate D) chordate
Wednesday, January 28, 2015 at 1:14pm

Physical ScienceWhich of the following statements are true about chemical reactions? Check all that apply. A. Reactants are on the right when writing a chemical reaction. B. Products are produced in a reaction. C. Reactants are present at the end of a reaction. D. Products are on the right ...
Tuesday, January 27, 2015 at 11:25pm

Earth ScienceDescribe how weathering and erosion can be both destructive or constructive. I am still confused on the difference of erosion and weathering...
Tuesday, January 27, 2015 at 9:52pm

ScienceHow much net force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s^2? A. 62N B. 62 kg C. 120 N D. 120 kg Is the answer C? Thank you
Tuesday, January 27, 2015 at 5:15pm

PhysicsFor a science fair competition, a group of High School students built a kicker-machine that can launch a golf ball from the origin with a velocity of 12.9 m/s and initial angle of 31.7° with respect to the horizontal. a) Where will the golf ball fall back to the ground? ...
Tuesday, January 27, 2015 at 5:09pm

sciencea colorblind woman marries a man who isn't colorblind. All of their sons are color blind but none of their daughters are color blind. color blindness is likely 1)the result of having two few chromosomes 2)the result of having and extra chromosomes 3)a sex-linked trait 4)a ...
Tuesday, January 27, 2015 at 5:04pm

ScienceIf a 40 kg person is accelerating at 10 m/s^2, then the magitude of the force acting on him or her is 400 N. True False Is the answer True? Thank you
Tuesday, January 27, 2015 at 5:02pm

ScienceTrue / False: If a 40 kg person is accelerating at 10 m/s^2,then the magnitude of the force acting on him or her is 400 N. 1.How much force is needed to make a 60 kg object accelerate at a rate or 2.0 m/s ^2? 2.What is the acceleration of a 30 kg objedct when 180 n of force is...
Tuesday, January 27, 2015 at 12:17pm

Science A male peacock displays his colorful tail feathers in order to 1) increase the success rate of asexual reproduction 2) increase the gestation period 3) release gametes into its surroundings 4) attract a mate I chose 4
Tuesday, January 27, 2015 at 11:04am

scienceWhen a fan is turned on it changes electrical energy into blank energy is it ma. Motion b.magnetic c. Gravitational. D. Electromagnetic
Tuesday, January 27, 2015 at 10:44am

Science#1 Which of the following allows a plant's vascular system to work as a transport system? A A plant's vascular system is made up of specialized cells that move around the plant as it grows. B A plants vascular system is made up of specialized cells that are covered in ...
Tuesday, January 27, 2015 at 9:46am

scienceThe steel round frame is 2,4m high. There have to be wrapd five coils around the frame. One coil diameter is 35mm. Each coil is 50m long. All of the coils have to be wrapd next to each other.What must the diameter be of the frame if the hight of the frame is 2,4m.
Tuesday, January 27, 2015 at 5:42am

scienceShoe companies imbed unique designs on bottom of the sneakers they manufacture.what is the made n purpose? A to increase potential energy B to decrease friction C increase friction D to decrease potential energy. I think its C am I correct?
Monday, January 26, 2015 at 8:17pm

ScienceA lead fishing weight with a mass of 57g absorbs 146 cal of heat. If its initial temperature is 48 C, what is its final temperature?
Monday, January 26, 2015 at 8:01pm

ScienceIf the mass of a ball is 20g and h is 8m, calculate the kinetic energy when it has a velocity of 2ms raise to power minus 1
Monday, January 26, 2015 at 4:47pm

scienceBacteria are invisible to humans except under a microscope. Which evidence did Pasteur use to show that bacteria were the cause of soured wine? A. Heated wine did not sour B. Capped wine did not sour C. Filtered wine did not sour D. Chilled wine did not sour I need help to ...
Monday, January 26, 2015 at 4:45pm

sciencepassive transport involves movement of substances...... A) from areas of lower concentration areas of higher concentrations. B)from areas of higher concentrations to areas of lower concentration C) from areas which the concentration has reached a balance D) from areas of ...
Monday, January 26, 2015 at 4:00pm

ScienceCheck My Answers, please? Which of the following planets is considered a rocky, or terrestrial, planet? Venus **** Neptune Saturn Uranus Which of the following statements about the beginning of the solar system is true? The planets that formed closest to the sun became gas ...
Monday, January 26, 2015 at 3:35pm

physical scienceA bungee jumper jumps from a high bridge 100 m above a river. How fast does he fall after he has covered 60 m after jumping from the bridge? (Ignore air resistance in the fall.)
Monday, January 26, 2015 at 1:19pm

Physical ScienceA hot metal spoon with a mass of 77.0 grams and a temperature of 95.0 degrees celsius is placed into a cup containing 100 grams of water at 20 degrees celsius. When the spoon and water reach equilibrium, they both have a temperature of 25 degrees celsius. What is the spoon ...
Monday, January 26, 2015 at 12:22pm

Science. To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find the percent concentration at this temperature. 3. A solution of acetone contains 20 ml of acetone in 480 ml of water. Calculate the % concentration of solution
Sunday, January 25, 2015 at 11:58pm

science plz help right now!!!!1.which of the following could be true of two different species that have a competive relationship in the same ecosystem? A.one species preys on the other B .the relationship is mutually beneficial. C.They share the same niche D.one species benefits, while the other is neither...
Sunday, January 25, 2015 at 5:27pm

concept developmentWhich of the following is the crux of the interrelationship between mathematics and science? A. About half of the basic math concepts are related to science concepts. B. The basic concepts of mathematics are the basic process skills of science. C. Basic mathematics process ...
Sunday, January 25, 2015 at 10:33am

ScienceIdentify and discuss at least two forces that would be involved when an elderly patient who is proped up at about 4 degrees in a bed and slowly slides down to an almost horizontal position?
Saturday, January 24, 2015 at 11:24pm

concept developmentWhich of the following is not a reason to make mathematics and science instruction relevant? A. To protect schools from being sued for discrimination B. To consider diversity in race, ethnicity, social class, and gender C. To build on concepts that children learn before they ...
Saturday, January 24, 2015 at 11:30am

scienceA tractor pulls a tree trunk across a horizontal piece of ground. If the force in a chain is 3000N and the chain forms an angle of 30 degrees with the ground, calculate the force with which the tree is pulled across the ground and the force with which the tree is lifted
Saturday, January 24, 2015 at 7:33am

Science plz helpExplain the basic parts of a major theme in molecular biology: the pathway of DNA to RNA to proteins. Include a general idea of what occurs at each stage
Friday, January 23, 2015 at 3:13pm

Science1)What is the Theory of Plate Tectonics? 2)What physical features are caused by plate tectonics? 3)What causes Earth's plates to move continuously?
Friday, January 23, 2015 at 2:17pm

sciencethe vapour pressure of pure liquid benzene and toluene are 160mm and 60 mm repectively. calculate the vapour pressure of an equimolar solution at the same temperature?
Friday, January 23, 2015 at 3:31am

ENGLISH1.Is the group of words a simple sentence, a compound sentence, a run-on sentence, or a sentence fragment? Her computer has new software, it runs much faster now. A. run-on sentence B. sentence fragment** C. compound sentence D. simple sentence 2.Is the group of words a simple...
Friday, January 23, 2015 at 1:00am

scienceThe speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-4.25 10^7) t^2 + (3.45 10^5) t, where v is in meters per second and t is in seconds. The acceleration of the bullet just as it leaves the barrel is zero. (a) Determine the ...
Thursday, January 22, 2015 at 10:42pm

scienceA ball is thrown upward from the ground with an initial speed of 16.0 m/s; at the same instant, another ball is dropped from a building 12 m high. After how long will the balls be at the same height above the ground?
Thursday, January 22, 2015 at 10:39pm